JP2748285B2 - Extrusion press product straightening guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product straightening guide device for an extrusion press, and more particularly to a product straightening guide device suitable for guiding a product extruded from an end platen of an extrusion press to a shear for cutting to a fixed size.

[0002]

2. Description of the Related Art Generally, in an extrusion press, after a heated billet is charged, the billet is pressed toward a die by a pressurizing operation by a stem, and is pressed while being formed into a predetermined shape determined by a die shape of the die. I'm trying to put it out. The extruded product is sent out through a hole in the end platen, and is cut to a fixed size by a shear installed near the exit side of the end platen.

Since the cross section of a product formed and extruded by an extrusion press does not always have a linear shape, the extrusion flow of the billet during extrusion is not uniform over the entire cross section of the die hole. For this reason, when the molded product is extruded from the die hole opening, the molded product bends in a direction in which the flow is poor, and the amount of deviation of the product end from the extrusion center increases as the product is fed from the end platen. If left unchecked, the tip of the extruded product will not enter the entrance of the shear, so the product is properly guided to the shear.

A conventional product guide of this type is shown in FIGS.
As shown in (1), it is attached to an end face of an end platen 2 in which a hole 1 serving as a product outlet is opened. It has an elevating table 5 movably mounted by a guide rod 4 formed between the end platen 2 and the elevating table 5, and is vertically driven by a cylinder device 6. A pair of rollers 7 is mounted on the upper surface of the elevating platform 5, the height of the elevating platform 5 is determined so that the roller surface substantially matches the lower surface of the platen hole 1, and the extruded molded product is moved by the roller. It is. And
If the extruded product comes out bent,
The height of the lift 5 is changed so that the end of the product is properly fed into the introduction opening of the subsequent shear.

[0005]

However, in the conventional product straightening guide device described above, the straightening guide function is exhibited to some extent when the bending direction of the extruded product is on the lower surface side. It does not work if the direction is oblique. For this reason, conventionally, an operator has been waiting at the exit of the end platen, grasping the end of the product with a yatco, and guiding this to the shear. However, although it is possible to directly guide the correction by grasping the product when the product size is small, it is actually a very difficult task when the product size is large.

An object of the present invention is to pay attention to the above-mentioned conventional problems, and to safely follow an extruded product sent from an end platen without human operation regardless of the bending direction. An object of the present invention is to provide a product straightening guide device of an extrusion press that can be guided to an inlet of a shear.

[0007]

In order to achieve the above object, a product straightening guide device for an extrusion press according to the present invention comprises:
A straightening guide device installed between an end platen of an extrusion press and a shear following the guide to guide an extruded product sent from the end platen to a shear,
A guide table that can be tilted around an axis along the center of extrusion is provided in a passage portion of the extruded product in the platen hole of the end platen or behind the platen hole, and a portal guide frame is provided above the guide table. An arm extending downward at both ends of the guide frame is provided.

[0008]

According to the above construction, the conveying surface of the guide table is adjusted in advance to the height of the lower surface of the hole of the end platen, and the product extruded from the platen hole waits. When the product protrudes from the platen end face, the guide table is raised slightly so that the product is placed on the conveying surface, thereby suppressing the downward bending of the product. Further, when the product is sent out, by lowering the portal guide frame, the upward bending of the product is suppressed, and at the same time, the bending in the left and right directions is restricted by the left and right arms. The height of the gate-type guide frame can be changed arbitrarily according to the degree of bending of the product, and it can be prevented from bending beyond the height and width of the inlet of the shear placed at the subsequent stage, and it is guided to the shear properly by mechanical force You can do it. In addition, the guide table can be tilted, and when the extruded product is bent obliquely downward and sent out, the guide surface can be arranged so that the guide surfaces face each other in the bending direction. Is done. In this way, even if the extruded product is bent and extruded, it is always regulated and the leading end of the product is properly guided to the shear introduction port, so that not only small cross-section products but also large cross-section products can be properly guided. It is.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an extrusion press product straightening guide device according to the present invention.

FIGS. 1 and 2 are a side sectional view and an end view of an end platen hole of an extrusion press to which a product straightening guide device according to an embodiment is attached.

An end platen 12 is disposed at the rear end of the extrusion press 10, and has a hole 14 serving as a passage for a product extruded by a die. A lower surface table 16 is mounted on the inner surface of the platen hole 14, and a carbon liner 18 is laid on the lower surface table 16 to prevent the extruded product from being damaged.

A shear 2 for cutting the extruded product to a fixed size, facing the end face of the end platen 12.
0 is arranged. It has a rectangular frame 22 formed so as to surround the delivery line of the extruded product, and has a pair of upper and lower cutters 24 which are guided by the frame 22 and move up and down. A hydraulic cylinder 26 is connected to each cutter 24, and is driven and cut when the extruded product has passed a predetermined length by hydraulic pressure. The shear 20 is provided with a shear table 28 on which the extruded product is placed, and the product is placed on the table 28 and cut.

The product straightening guide device 30 according to the embodiment is installed between the end platen 12 of the extrusion press 10 and the shear 20, and corrects the bending of the product to be extruded. It is to guide.

The product straightening guide device 30 includes a guide table 32 for straightening and guiding the lower part of the product extruded from the platen hole 14, and a portal guide frame 34 for straightening and guiding the left, right and upper parts of the product. .

First, the guide table 32 is connected to an elevator 36 mounted and supported on the end face of the end platen 12 below the hole 14. The elevating table 36 is mounted on the end platen 12 via a pair of parallel guide rods 38 so as to be movable up and down.
It can be driven up and down by an elevating cylinder mechanism 40 attached between them. A table body 44 is pivotally mounted on the upper surface of the elevating table 36 via a connection shaft 42 arranged in parallel with the extrusion center line.
4 can be tilted. In order to perform this tilting operation, a tilting cylinder mechanism 45 is attached to the lower surface on one end side of the table body 44, and the tilting cylinder mechanism 45 is
Side. Therefore, by driving the tilt cylinder mechanism 45, the table main body 44 is rotated about the connecting shaft 42 and is arranged to be inclined. Further, the table body 44 is provided with a guide roller 48 attached to a shaft extending in a direction perpendicular to the extrusion center, and a screw shaft 47 having a handle and a pair of parallel shafts 46 arranged in parallel with the guide roller 48. An operation piece is mounted through the shaft 46,
Each piece is screwed onto the screw shaft 47 and attached to the screw shaft 47, and the interval between the operation pieces can be adjusted according to the width of the product to be extruded. This adjustment is performed by moving the operation piece by rotating the shaft 47 parallel to each roller 48 with the handle 50. Such a guide table 32 constitutes a so-called roller table mechanism, and a conveying surface formed by the upper end of the guide roller 48 supports the lower surface of the extruded product from the platen hole 14.

On the other hand, a portal guide frame 34 is disposed above the guide table 32 as described above. The lifting cylinder mechanism 52 attached to the end surface of the end platen 12 at the upper side of the platen hole 14
It is supported so that it can move up and down. The gate type guide frame 34 includes a beam member 54 directly connected to the cylinder mechanism 52 and a pair of arms 56 attached to both ends thereof.
R and 56L are formed in a gate shape, and can be moved down to the opening of the platen hole 14 by driving the lift cylinder mechanism 52.

The pair of arms 56R and 56L are respectively mounted on the beam member 54 so as to be able to move in a transverse direction.
The interval can be adjusted. 3 and 4 show the arm 5
6R and 56L are shown, and sliding bars 58R and 58L are provided inside the beam member 54 so as to be slidable along side edges thereof, and arms 56R and 58R are provided at their respective ends. 56L is suspended. In addition, each sliding bar 5
Racks 60R and 60L are fixed to opposing surfaces of 8R and 58L, and a pinion 62 that meshes with these racks 60R and 60L is attached to a substantially central position of the beam member 54. Therefore, by sliding one of the sliding bars 58R (58L), the other sliding bar 58L (58R) is slid in the opposite direction via the pinion 62, and the distance between the pair of arms 56R, 56L is thereby reduced. Has been changed. In order to provide this drive, a transverse cylinder mechanism 64 is attached to the side edge of the beam member 54, and its rod 66
Is connected to a bracket 68 provided on one sliding bar 58R.

Further, such a gate-type guide frame 34
1, a guide roof 70 is provided on the surface facing the shear 20 so as to coincide with a shear roof 72 provided on the upper edge of the introduction opening of the shear 20 at the standby position of the product guide. At least in the standby state, the product is introduced into the opening of the shear 20.

The operation of the product straightening guide device of the extrusion press configured as described above is as follows. When the product is extruded, the elevating cylinder mechanism 4 of the lower guide table 32 is operated to arrange the table conveying surface so as to substantially coincide with the lower surface of the extruded product. Then, the upper gate-type guide frame 34 is lowered by driving the lifting / lowering cylinder mechanism 52, and is moved to a position where the guide roof 70 coincides with the shear roof 72. With this operation, the portal guide frame 34 enters a standby state. At this time, the interval between the pair of arms 56R and 56L of the gate-type guide frame 34 is adjusted to match the opening width of the inlet of the shear 20. This is performed by the traversing cylinder mechanism 64.

When the extrusion operation is started in the state where the preparation operation has been performed, the product is sent out from the hole 4 of the end platen 12. There is no problem when this product is sent out along the extrusion center, but when the product end is bent and is pushed out of the extrusion center, the straightening guide device 30 is used to perform the straightening operation. Drive.
That is, when the bending direction of the extruded product is downward, the height of the guide table 32 is adjusted so that the end of the product is smoothly transferred to the shear table 28. When the guide frame 34 is pushed upward, the gate-shaped guide frame 34 is lowered and pressed down from above by the beam member 54, thereby suppressing the bending.

When there is a left-right bend, the interval between the arms 56R and 56L of the portal guide frame 34 is reduced by the operation of the traversing cylinder mechanism 64, and the shear 2
The correction guide is made so as to be directed to the zero inlet.

On the other hand, when the extruded product bends obliquely downward and is extruded, the tilting cylinder mechanism 45 is driven by the guide table 32 to move the table body 44 in the bending direction.
May be inclined so as to face each other. On the other hand, if it is bent upward and extruded,
By performing the lowering operation of Step 4 and adjusting the interval between the arms 56R and 56L, the correction work is performed so as to suppress the bending inclination.

As described above, according to this embodiment, when a product extruded from the end platen 12 of the extrusion press 10 is bent, a mechanical straightening guide is provided regardless of the direction of the bending. And the guide can be appropriately guided to the shear 20. In addition, since the guide is performed while correcting the bending, there is an advantage that the cutting operation in the subsequent shear 20 becomes easy and the load of the bending correction force in the shear 20 itself can be reduced. In particular, since it is driven by a cylinder mechanism without requiring any manual operation, it is possible to promptly respond to the bending direction of the extruded product and to perform appropriate correction.

In the above embodiment, the guide table 3
Although the roller table 2 has a roller table structure, as shown in FIG. 5, a stepped slide table 74 is installed on the table body 44, and the slide table 74 is mounted on a cylinder mechanism 76 attached to a side end of the table body 44. The structure may be connected. According to this, the slide table 74 can be slid in the direction orthogonal to the center of extrusion, and the extruded product 78 can be bent to the side at the step. Further, a concave depression is formed at the center of the slide table 74, and a screw rod is screwed in place of the cylinder mechanism 75 so as to be reciprocally slidable, so that the product can be handled in both right and left bending directions. Is also possible. Further, as in the present invention, the arms 56R, 56
L is not limited to being disposed so as to be able to drive up and down and to be able to move toward and away from each other.
The arm 56R, 56L may be fixed to the fixed member 4 at a fixed distance, and the portal guide frame 34 may be driven up and down and movable left and right.

[0025]

As described above, in the product straightening guide device of the extrusion press according to the present invention, the guide table that follows the lower surface of the platen hole is mounted so as to be able to move up and down, and is tilted around the axis along the center of the extrusion. Drivable mounting, a portal guide frame is provided above the guide table, and arms extending both ends of the guide frame are provided, so that the extruded product sent from the end platen can be bent in the bending direction. Regardless of the above, an excellent effect of being able to be safely guided to the subsequent inlet of the shear without human work is obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a structure of a product straightening guide device according to one embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan sectional view of an arm driving mechanism of the portal guide frame.

FIG. 4 is a cross-sectional view of an arm driving mechanism of the portal guide frame.

FIG. 5 is a front view showing another embodiment of the product straightening guide device of the present invention.

FIG. 6 is a side sectional view of a conventional product guide device.

FIG. 7 is a front view of a conventional product guide device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Extrusion press 12 End platen 14 Platen hole 20 Shar 24 Cutter 28 Shaft table 30 Product straightening guide device 32 Guide table 34 Gate type guide frame 36 Lifting table 42 Connecting shaft 44 Table body 48 Guide row La 54 Beam member 56R, 56L Arm 64 Traverse cylinder mechanism

────────────────────────────────────────────────── ─── Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B21C 35/02-35/03

Claims (1)

(57) [Claims] 1. A straightening guide device installed between an end platen of an extrusion press and a shear subsequent thereto and guiding an extruded product sent from the end platen to a shear, wherein a straightening guide device is provided in a platen hole of the end platen. Or, a guide table that can be tilted around an axis along the center of extrusion is provided in a passage portion of the extruded product behind the platen hole, a portal guide frame is provided above the guide table, and both ends of the guide frame are A product straightening guide device for an extrusion press, comprising an arm extending downward.